The Valiant Sailor is named after the sailor Jack Crawford who, during the Battle of Camperdown in 1797, contributed to the naval victory over the Dutch.

Mr Berthoud said he did not realise how special the building was when he purchased it a year ago.

He said he was looking forward to showing people round.

The heritage open days, which run from 12 to 21 September, celebrate the best of the county’s history and heritage.

Norfolk’s naval heritage is also highlighted in Great Yarmouth where visitors to The Norfolk Naval Pillar can learn more about the life of Vice Admiral Lord Nelson.

The column, which has 217 steps to the top, was completed in 1817, as a tribute to his life.

Kim Leonard from King’s Lynn Civic Society praised the support of volunteers and owners who make the day possible.

“A lot of buildings are privately owned and are businesses. You wouldn’t get in them on 364 days of the year,” he said.